摘要
The utilization of fiber reinforced thermoplastics(FRTP)is expected to fulfill lightweight demand in mass-produced aerospace products.Facing the unavoidable assembly of FRTP parts,fusion bonding methods such as resistance welding are promising compared with mechanical joint and adhesive bonding.In this paper,a procedure has been brought out to understand the relationship between processing conditions and performance of the FRTP welding joints.The adherends were continuous glass fiber reinforced polypropylene(GF/PP)laminates fabricated by hotpressing method.The influences of time,current and pressure on the bending strength of the resistance welding joints were investigated.A processing window was drawn based on the optical observation of welded surfaces.The quantitative relationship between process parameters and mechanical property of GF/PP welding joint was established by Response Surface Method(RSM)with high accuracy.It was found that bending strength of GF/PP welding joint was improved by 31%compared with hot-pressing benchmark.
基金
Supports from the National Natural Science Foundation of China(Nos.11972096 and 11572059)
CAST Young Elite Scientists Sponsorship Program(2017QNRC001)
Chinese-Foreign Excellent Youth Exchange Program(2017CASTQNJL042)
Fundamental Research Funds for the Central Universities(2018CDQYHK0029)
Chongqing Key R&D Program(cstc2017zdcy-zdyfX0005)
Chongqing Natural Science Foundation(cstc2018jcyjAX0089)。
